Author: Stephen Bourget
MDL-50916 Lesson: Fix information on complete report
http://git.moodle.org/gw?p=moodle.git;a=commit;h=764c4fbcba5626321030bf855cfa6cf1ac759471
http://github.com/moodle/moodle/commit/764c4fbcba5626321030bf855cfa6cf1ac759471
+ 3.1 en [totalpagesviewedheader,mod_lesson]